Matches in Library of Congress for { ?s ?p 1981. }
- 80041511%2F%2Fr90 date "1981".
- 80041512 date "1981".
- 80041514 date "1981".
- 80041516 date "1981".
- 80041517 date "1981".
- 80041518 date "1981".
- 80041519 date "1981".
- 80041521 date "1981".
- 80041522 date "1981".
- 80041523%2F%2Fr853 date "1981".
- 80041524%2F%2Fr96 date "1981".
- 80041525%2F%2Fr97 date "1981".
- 80041526%2F%2Fr89 date "1981".
- 80041528 date "1981".
- 80041530 date "1981".
- 80041531 date "1981".
- 80041533 date "1981".
- 80041534 date "1981".
- 80041535 date "1981".
- 80041537 date "1981".
- 80041538 date "1981".
- 80041542 date "1981".
- 80041546 date "1981".
- 80041547%2F%2Fr85 date "1981".
- 80041548 date "1981".
- 80041549 date "1981".
- 80041550 date "1981".
- 80041551 date "1981".
- 80041553 date "1981".
- 80041554 date "1981".
- 80041558 date "1981".
- 80041559 date "1981".
- 80041560 date "1981".
- 80041561 date "1981".
- 80041562%2F%2Fr872 date "1981".
- 80041563 date "1981".
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- 80041565%2F%2Fr882 date "1981".
- 80041566 date "1981".
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- 80041570 date "1981".
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- 80041572%2F%2Fr892 date "1981".
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- 80041576 date "1981".
- 80041577 date "1981".
- 80041581 date "1981".
- 80041585%2F%2Fr82 date "1981".
- 80041586 date "1981".
- 80041587 date "1981".
- 80041588%2F%2Fr903 date "1981".
- 80041589%2F%2Fr832 date "1981".
- 80041590 date "1981".
- 80041593%2F%2Fr85 date "1981".
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- 80041596%2F%2Fr982 date "1981".
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- 80041600%2F%2Fr892 date "1981".
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- 80041602 date "1981".
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- 80041611%2F%2Fr822 date "1981".
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- 80041614%2F%2Fr944 date "1981".
- 80041615 date "1981".
- 80041617 date "1981".
- 80041620 date "1981".
- 80041622%2F%2Fr96 date "1981".
- 80041624 date "1981".
- 80041625 date "1981".
- 80041626 date "1981".
- 80041627 date "1981".
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- 80041630%2F%2Fr98 date "1981".
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- 80041649%2F%2Fr902 date "1981".
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- 80041653%2F%2Fr94 date "1981".
- 80041654%2F%2Fr97 date "1981".
- 80041655 date "1981".
- 80041656 date "1981".
- 80041657%2F%2Fr94 date "1981".
- 80041658 date "1981".
- 80041662 date "1981".
- 80041663 date "1981".
- 80041664 date "1981".
- 80041666%2F%2Fr923 date "1981".
- 80041671 date "1981".
- 80041674 date "1981".